An introduction to the displacement-based seismic design method of pile-supported wharf is presented,highlighting on the design ground motion,performance objectives,material properties,structural analysis model and seismic analysis methods,and some explanations for the methods are made.Based on the American codes,a case study is conducted to demonstrate the implementation of displacement-based seismic design strategy.It is apparent that displacement-based seismic design strategy fulfills the requirements of multi-seismic level and multi-performance objectives,and will be the trend of seismic design for pile-supported wharf.